Emulsification viscosity reduction agent for deep high-asphaltene super-heavy oil shaft

Abstract

The invention relates to an emulsification viscosity reduction agent for a deep high-asphaltene super-heavy oil shaft, and belongs to the technical field of oil field chemical agent design. The emulsification viscosity reduction agent is characterized by comprising the chemical structural formula as follows, wherein R represents C8H17, C9H19, C10H21, C11H23 and C12H25; Y represents -CH2CH2-, -CH2CH2CH2-, -CH2CH2CH2CH2- and -CH2CH2CH2CH2CH2-; M represents Na, K and Li. The emulsification viscosity reduction agent for the deep high-asphaltene super-heavy oil shaft can be dissolved in formation water with hypersalinity and high calcium and magnesium ion content or oily sewage, is mixed with deep super-heavy oil and is compatible and soluble with asphaltene, so that the oil-water interfacial tension is reduced, an O / W emulsion is formed, the lifting viscosity of the deep super-heavy oil in the shaft is effectively reduced, the conventional lifting and exploiting requirements of the shaft are met, and economy and effectiveness for development of the deep super-heavy oil are improved.

Description

Technical field: [0001] The invention relates to an emulsified viscosity reducer for high-asphaltenes deep layer ultra-heavy oil wellbore, which belongs to the technical field of oil field chemical agent design. Background technique: [0002] The deep heavy oil is buried below 3,000 meters and can flow into the wellbore smoothly at formation temperature, but the wellbore must be reduced in viscosity to be lifted to the ground. According to the viscosity of the deep heavy oil at 50°C, it can be divided into ordinary deep heavy oil (<10000mPa.s), extra heavy oil ( <50000mPa.s) and super heavy oil (> 50000mPa.s). my country's deep heavy oil has the characteristics of ultra-deep (>5000m), ultra-thick (>50000mPa.s), high salinity (>100000mg / l), high asphaltene (>27%), etc.; existing shallow heavy oil exploitation The steam huff and puff, steam injection, electric heating and other technologies used in the system have poor adaptability and cannot meet the need...

AI Technical Summary

Problems solved by technology

[0003] However, for the exploitation of deep ultra-heavy oil with high salinity and high asphaltene content, none of the existing conventional surfactants can meet the needs of emulsification and viscosity reduction under on-site environmental conditions; An anti-salt and anti-calcium emulsifying viscosity reducer for deep super heavy oil is announced. However, because of the absence of benzene rings in the long hydrophobic chain of the gemini surfactant, its compatibility and emulsification of high asphalt deep super heavy oil Viscosity reduction effect needs to be improved

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